Suppression and inducement of the charge-density-wave state in CrxTiSe2 / Selezneva N. V.,Sherokalova E. M.,Pleshchev V. G.,Kazantsev V. A.,Baranov N. V. // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2016. - V. 28, l. 31.

ISSN/EISSN:

0953-8984 / 1361-648X

Type:

Article

Abstract:

The x-ray diffraction, electrical resistivity and thermal expansion measurements have been employed to study how the intercalation of Cr atoms into TiSe2 matrix affects the crystal structure, formation of the charge density wave (CDW) and electrical properties. The intercalation of a small amount of Cr atoms (up to x similar to 0.03) is observed to suppress the CDW formation. The electrical resistivity of CrxTiSe2 compounds with the Cr concentrations 0.03 <= x <= 0.20 shows a metallic-type behavior; while in the concentration range 0.25 <= x <= 0.5, the resistivity shows an anomalous behavior indicating the reappearance of the transition to a CDW-like state; further growth of the Cr content up to x = 0.6 again leads to the metallic-type resistivity. For the compound Cr0.25TiSe2, the phase transition below 160 K together with abnormal change in the electrical resistivity is found to be accompanied by anomalies in the lattice parameters and thermal expansion behavior; this transition is classified as first-order type. It has been found that despite the intercalation of Cr atoms some Ti-Se bonds in the Se-Ti-Se tri-layers of CrxTiSe2 with x <= 0.5 have nearly the same lengths as in the host lattice TiSe2, which apparently allows the transition to be returned to the CDW-like state.

Author keywords:

CrxTiSe2; transition metal dichalcogenides; charge density wave; intercalation; crystal structure; phase transition; electrical resistivity TRANSITION-METAL DICHALCOGENIDES; ELECTRICAL-RESISTIVITY; TRANSPORT-PROPERTIES; TITANIUM DISELENIDE; PHYSICAL-PROPERTIES; MAGNETIC-PROPERTIES; TISE2; CR; RESISTANCE; CUIR2TE4

DOI:

10.1088/0953-8984/28/31/315401

Web of Science ID:

ISI:000378325200005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG 10
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	315401
EISSN	1361-648X
Keywords-Plus	TRANSITION-METAL DICHALCOGENIDES; ELECTRICAL-RESISTIVITY; TRANSPORT-PROPERTIES; TITANIUM DISELENIDE; PHYSICAL-PROPERTIES; MAGNETIC-PROPERTIES; TISE2; CR; RESISTANCE; CUIR2TE4
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	baranov@imp.uran.ru
ResearcherID-Numbers	Baranov, Nikolai/J-5042-2013 kazantsev, vadim/J-5186-2013
ORCID-Numbers	Baranov, Nikolai/0000-0002-9720-5314 kazantsev, vadim/0000-0003-2407-6280
Funding-Acknowledgement	Ministry of Education and Science of Russia {[}1362]; Russian Foundation for Basic Research {[}16-32-00278]; program of UB of RAS {[}15-17-2-22]
Funding-Text	This work was supported by the Ministry of Education and Science of Russia (project No 1362), by the Russian Foundation for Basic Research (project No 16-32-00278) and by the program of UB of RAS (project No 15-17-2-22).
Number-of-Cited-References	37
Usage-Count-Last-180-days	6
Usage-Count-Since-2013	38
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	DP2NJ